Dimensions of Non-Metallic Flat Gaskets ASME B16.21
to be used with RF flanges ASME B16.47 series B
NPS 26 - 60
| NPS | d1 | d2 | |||
| Class 150 |
Class 300 |
Class 400 |
Class 600 |
||
| 26 | 660 | 725 | 772 | 746 | 765 |
| 28 | 711 | 776 | 826 | 800 | 819 |
| 30 | 762 | 827 | 886 | 857 | 879 |
| 32 | 813 | 881 | 940 | 911 | 933 |
| 34 | 864 | 935 | 994 | 962 | 997 |
| 36 | 914 | 987 | 1048 | 1022 | 1048 |
| 38 | 965 | 1045 | 1099 | ||
| 40 | 1016 | 1095 | 1149 | ||
| 42 | 1067 | 1146 | 1200 | ||
| 44 | 1118 | 1197 | 1251 | ||
| 46 | 1168 | 1256 | 1318 | ||
| 48 | 1219 | 1307 | 1368 | ||
| 50 | 1270 | 1357 | 1419 | ||
| 52 | 1321 | 1408 | 1470 | ||
| 54 | 1372 | 1464 | 1530 | ||
| 56 | 1422 | 1514 | 1594 | ||
| 58 | 1473 | 1580 | 1656 | ||
| 60 | 1524 | 1630 | 1705 | ||
General notes..
- Dimensions are in millimeters unless otherwise indicated.
- d1 = Inside diameter.
- d2 = Outside diameter.
- Dimensional tolerances OD.. +0 / -3.0 mm.
- Dimensional tolerances ID.. ± 3.0 mm.
- Thickness (t) specified by customer.